Home / 1,265.40-1,900.44-939.72

Finding the Fourth Proportional to 1,265.40, 1,900.44 and 939.72

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Solution

The fourth proportional to 1,265.40, 1,900.44 and 939.72 is: 1,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.40 : 1,900.44 = 939.72 : x
  2. Step 2: Convert to fraction form
    1,265.40/1,900.44 = 939.72/x
  3. Step 3: Cross multiply
    1,265.40x = 1,900.44 × 939.72
  4. Step 4: Simplify right side
    1,265.40x = 1,785,881.48
  5. Step 5: Solve for x
    x = 1,785,881.48/1,265.40
  6. Step 6: Final answer
    x = 1,411.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.